diff options
Diffstat (limited to 'src/rtl')
| -rw-r--r-- | src/rtl/sha512_core.v | 67 |
1 files changed, 39 insertions, 28 deletions
diff --git a/src/rtl/sha512_core.v b/src/rtl/sha512_core.v index 1b1aeda..576d872 100644 --- a/src/rtl/sha512_core.v +++ b/src/rtl/sha512_core.v @@ -108,6 +108,13 @@ module sha512_core( reg [63 : 0] h_new; reg a_h_we; + reg [63 : 0] t1_reg; + reg [63 : 0] t1_new; + reg t1_we; + reg [63 : 0] t2_reg; + reg [63 : 0] t2_new; + reg t2_we; + reg [63 : 0] H0_reg; reg [63 : 0] H0_new; reg [63 : 0] H1_reg; @@ -147,7 +154,6 @@ module sha512_core( reg [1 : 0] sha512_ctrl_new; reg sha512_ctrl_we; - reg [63 : 0] t1_reg; //---------------------------------------------------------------- // Wires. @@ -162,9 +168,6 @@ module sha512_core( reg ready_flag; - reg [63 : 0] t1; - reg [63 : 0] t2; - wire [63 : 0] k_data; reg w_init; @@ -237,31 +240,36 @@ module sha512_core( begin : reg_update if (!reset_n) begin - a_reg <= 64'h0000000000000000; - b_reg <= 64'h0000000000000000; - c_reg <= 64'h0000000000000000; - d_reg <= 64'h0000000000000000; - e_reg <= 64'h0000000000000000; - f_reg <= 64'h0000000000000000; - g_reg <= 64'h0000000000000000; - h_reg <= 64'h0000000000000000; - H0_reg <= 64'h0000000000000000; - H1_reg <= 64'h0000000000000000; - H2_reg <= 64'h0000000000000000; - H3_reg <= 64'h0000000000000000; - H4_reg <= 64'h0000000000000000; - H5_reg <= 64'h0000000000000000; - H6_reg <= 64'h0000000000000000; - H7_reg <= 64'h0000000000000000; - work_factor_ctr_reg <= 32'h00000000; - digest_valid_reg <= 0; + a_reg <= 64'h0; + b_reg <= 64'h0; + c_reg <= 64'h0; + d_reg <= 64'h0; + e_reg <= 64'h0; + f_reg <= 64'h0; + g_reg <= 64'h0; + h_reg <= 64'h0; + t1_reg <= 64'h0; + t2_reg <= 64'h0; + H0_reg <= 64'h0; + H1_reg <= 64'h0; + H2_reg <= 64'h0; + H3_reg <= 64'h0; + H4_reg <= 64'h0; + H5_reg <= 64'h0; + H6_reg <= 64'h0; + H7_reg <= 64'h0; + work_factor_ctr_reg <= 32'h0; + digest_valid_reg <= 1'h0; round_ctr_reg <= 7'h0; sha512_ctrl_reg <= CTRL_IDLE; - t1_reg <= 64'h0; end else begin - t1_reg <= t1; + if (t1_we) + t1_reg <= t1_new; + + if (t2_we) + t2_reg <= t2_new; if (a_h_we) begin @@ -419,7 +427,7 @@ module sha512_core( ch = (e_reg & f_reg) ^ ((~e_reg) & g_reg); - t1 = h_reg + sum1 + ch + k_data + w_data; + t1_new = h_reg + sum1 + ch + k_data + w_data; end // t1_logic @@ -439,7 +447,7 @@ module sha512_core( maj = (a_reg & b_reg) ^ (a_reg & c_reg) ^ (b_reg & c_reg); - t2 = sum0 + maj; + t2_new = sum0 + maj; end // t2_logic @@ -491,11 +499,11 @@ module sha512_core( if (state_update) begin - a_new = t1 + t2; + a_new = t1_new + t2_new; b_new = a_reg; c_new = b_reg; d_new = c_reg; - e_new = d_reg + t1; + e_new = d_reg + t1_new; f_new = e_reg; g_new = f_reg; h_new = g_reg; @@ -571,6 +579,9 @@ module sha512_core( state_init = 0; state_update = 0; + t1_we = 1; + t2_we = 1; + first_block = 0; ready_flag = 0; |